Peters



(No Model.) 2 SheetsSheet 1.

W. Z. RANSOM.

ELEVATOR.

Patented Dec. 2 7, 1887.

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no Model.) 2 Sheets-Sheet 2.

W. z. RANSOM.

v I ELEVATOR.-

No. 375385. PatentedDec. 27, 1887.

N4 PETERS, Photo-lithograph". Wanhinglon. D. C.

UNITED STATES PATENT OFFICE.

WILLIAM z. nAnsoM, OF sr. JosEPH, MISSOURI.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 375,385, dated December 4'7, 1887.

Application filed September 17, 1887. Serial No. 249,999. (No model.)

To all whom, it may concern.-

Be it known that I, WILLIAM Z. RANSOM, a citizen of the United States, residing at St. Joseph, in the county of Buchanan and'State of Missouri, have invented a new and useful Improvement in Elevators, of which the following is a specification.

My invention relates to improvements in warehouse and passenger elevators, in which, as the elevator passes up or down from floor to floor, that gate or door which is at the platform of the elevator will alone be opened.

The object of my improvement is to provide a guard that will prevent persons through carelessness or misapprehension stepping into the open hatchway.

I attain my objects by the mechanism illustrated in the accompanying drawings, in which Figures 1, 2, and 3 are front views of the elevator. Fig. 4 is a side view of the elevator, showing pulley P, cord 0, pulleysE and F, and drop or balance weight W. Fig. 5 shows inside of one of the main guide-posts of the elevator and cog-wheel B. Fig. 6 is a view of a rack. Fig.7 showsarackboltedto guide-postof car,both front and rear,forming a cogged flange operating 011 cog-wheel B when ascending or descending; Fig. 8, a top view showing ground plan of elevator. Fig. 9 shows cog-wheel B, shaft D, and pulley 1?, all revolving together when racks N T operate on cogwheel B.

Similar letters refer to similar parts throughout the several views.

A A are the main guideposts of elevatorshaft, extending from bottom to top of building. H H are the corner-posts; M M, guide posts of elevator cage or platform; B, the cogwheel keyed on shaft D and gained into and flush with inside of main guide-posts A A, as

shown in Figs. 1, 2, 3, 5, and 9; P, large pulley keyed on shaft D and running on the outside of main guide-postsAA,winding and unwinding cord 0; O, cord attached to pulley P, running over small pulley E on the outside of corner-post H and over small pulley F on front side of corner-post H, attached to gate or bar G and opening or closing gate G.

G, Fig. 1, shows gate closed. In Fig. 2 it shows position of gate when guideposts M M, Figs. 1, 2, 3, and 7, are in motion, and in Fig.

3 it shows the position of the gate when open with cord 0 wound once around pulley P.

D, as shown in Fig; 9, is the shaft passing through main guide-posts A A, connecting pulley P with cog-wheel B, all revolving together, as shown in Fig. 5; WV, a drop-weight attached by swivel to pulley P, for the purpose of taking the slack of cord G and holding pulleyP in position; also, with cog-wheel B in position to gear into racks N or T as guideposts M M move up or down; N, a cogged rack bolted onto guide-posts M M at the lower end and rear edge of guide-posts M M; T,acogged rack bolted on the front edge and top end of guide-posts M M far enough above the top end of rack N for weight W to bring pulley P and cog-wheel B into position ready for rack N to gear into cog-wheel B when the platform guideposts M M arein motion. Rack-s N and T, operating alternately upon opposite sides of cogwheel B,open and close the gate G. Starting at the first floor of elevator, the gate G opens, rack T above the cog-wheel passing upward, rack N closes the gate G on the first floor; rack T opens the gate G on the second floor; rack N, following, closes the gate at second floor, and, passingon, rackTopens thegate Gat third floor. Returning, the order is reversed, rack T closing the gate at third floor; rack N opens the gate at second fioor; rack T, following, closes the gate at second floor,and rack N opens the gate at thefirst floor as it started, leaving all gates closed except the gate where the platform is. That will always be open.

N o matter how many stories high the building may be, racks N and T are needed only once, being attached to the platform of the elevator; but the balance of the machinery must be duplicated for each story of the building.

The foregoing combination forms an automatic machine,which puts itself in gear when approaching the floor above or below. When the door or gate is opened, where desired, it nngears itself and is at rest. When leaving a door,either in ascending or descending, it gears itself for closing the door or gate and immediately closes the door or gate, and by the time the door or gate is closed it is ungeared and the machinery is at rest until near the next floor, when the foregoing operation is repeated.

What I claim as my invention, and desire to Ibo secure by Letters Patent of the United States, 2. The combination, in a warehouse or ispassenger elevator, of gate G, cog-wheel B, 1. The combination of an elevator cage or shaft 1), pulleys 1, E, and F, cord 0, drop platform provided with racks on opposite sides or balance Weight \V, cogged racks N and T, 15 5 of one of its posts, a pinion mounted on ashaft l main guide-posts A A, and cage or platform passing through a guide-post and adapted to guide-posts M M, all substantially as set forth alternately engage said racks, a Weighted puland described. ley on the opposite end of said shaft, the hatchway-gate, and a flexible connection between \Vitnesses: IO said pulley and the hatchway-gate, substan- JONES T. \VILSON,

tially as described. H. A. SMITH.

XVILLIAM Z. RANSOM. 

